What is the relationship between continent and 'Energy use (kg of oil equivalent per capita)'?

I need to know if the data satisfy parametric requirements to use parametric tests.

  1. The population from which samples are drawn should be normally distributed. -> Shapiro-Wilk test.
  2. Independence of cases: the sample cases should be independent of each other. -> I assume that this condition is satisfied.
  3. Homogeneity of variance: Homogeneity means that the variance among the groups should be approximately equal. -> Levene test

Shapiro-Wilk tests: rejected 4/5 null hypotheses. Data is not normal distributed

Leneve test: rejected null hypothesis.

Kruskal-Wallis H-test: rejected null hypothesis.

Asia's and Americas' energy use means are similar. Oceania's and Europe's energy use means are similar.

Is there a significant difference between Europe and Asia with respect to 'Imports of goods and services (% of GDP)' in the years after 1990? (Stats test needed)

Shapiro-Wilk tests: rejected 1/2 null hypotheses. Data is not normal distributed Leneve test: rejected null hypothesis.

Can not reject the null hypothesis of identical average scores.

What is the country (or countries) that has the highest 'Population density (people per sq. km of land area)' across all years? (i.e., which country has the highest average ranking in this category across each time point in the dataset?)

What country (or countries) has shown the greatest increase in 'Life expectancy at birth, total (years)' since 1962?